131305589 has 2 divisors, whose sum is σ = 131305590. Its totient is φ = 131305588.

The previous prime is 131305583. The next prime is 131305607. The reversal of 131305589 is 985503131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73393489 + 57912100 = 8567^2 + 7610^2 .

It is an emirp because it is prime and its reverse (985503131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131305589 - 2²⁰ = 130257013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131305583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65652794 + 65652795.

It is an arithmetic number, because the mean of its divisors is an integer number (65652795).

Almost surely, 2^131305589 is an apocalyptic number.

It is an amenable number.

131305589 is a deficient number, since it is larger than the sum of its proper divisors (1).

131305589 is an equidigital number, since it uses as much as digits as its factorization.

131305589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 131305589 is about 11458.8650834190. The cubic root of 131305589 is about 508.2699148929.

The spelling of 131305589 in words is "one hundred thirty-one million, three hundred five thousand, five hundred eighty-nine".